What gas octane???
Users of the big gassers: Dodge 6.4, GM 6.0, Ford 6.4....... Can the lower octane be used or do you need the higher octanes????? Colorado we have either 85, 87, or I think 91..
Forum Discussion
I found this Consumer Reports study to be of interest:
https://www.consumerreports.org/car-maintenance/study-shows-top-tier-gasoline-worth-extra-price/
https://www.consumerreports.org/car-maintenance/study-shows-top-tier-gasoline-worth-extra-price/
